/**
 * User: alesj
 * Date: 2004.11.15
 * Time: 13:32:28
 */

package com.generalynx.ecos.utils;

import java.io.PrintStream;
import java.io.PrintWriter;

public class NestedException
   extends Exception
   implements NestedThrowable
{
   /** The nested throwable */
   protected final Throwable nested;

   /**
    * Construct a <tt>NestedException</tt> with the specified detail
    * message.
    *
    * @param msg  Detail message.
    */
   public NestedException(final String msg) {
      super(msg);
      this.nested = null;
   }

   /**
    * Construct a <tt>NestedException</tt> with the specified detail
    * message and nested <tt>Throwable</tt>.
    *
    * @param msg     Detail message.
    * @param nested  Nested <tt>Throwable</tt>.
    */
   public NestedException(final String msg, final Throwable nested) {
      super(msg);
      this.nested = nested;
      NestedThrowable.Util.checkNested(this, nested);
   }

   /**
    * Construct a <tt>NestedException</tt> with the specified
    * nested <tt>Throwable</tt>.
    *
    * @param nested  Nested <tt>Throwable</tt>.
    */
   public NestedException(final Throwable nested) {
      this(nested.getMessage(), nested);
   }

   /**
    * Construct a <tt>NestedException</tt> with no detail.
    */
   public NestedException() {
      super();
      this.nested = null;
   }

   /**
    * Return the nested <tt>Throwable</tt>.
    *
    * @return  Nested <tt>Throwable</tt>.
    */
   public Throwable getNested() {
      return nested;
   }

   /**
    * Return the nested <tt>Throwable</tt>.
    *
    * <p>For JDK 1.4 compatibility.
    *
    * @return  Nested <tt>Throwable</tt>.
    */
   public Throwable getCause() {
      return nested;
   }

   /**
    * Returns the composite throwable message.
    *
    * @return  The composite throwable message.
    */
   public String getMessage() {
      return NestedThrowable.Util.getMessage(super.getMessage(), nested);
   }

   /**
    * Prints the composite message and the embedded stack trace to the
    * specified print stream.
    *
    * @param stream  Stream to print to.
    */
   public void printStackTrace(final PrintStream stream) {
      if (nested == null || NestedThrowable.PARENT_TRACE_ENABLED) {
         super.printStackTrace(stream);
      }
      NestedThrowable.Util.print(nested, stream);
   }

   /**
    * Prints the composite message and the embedded stack trace to the
    * specified print writer.
    *
    * @param writer  Writer to print to.
    */
   public void printStackTrace(final PrintWriter writer) {
      if (nested == null || NestedThrowable.PARENT_TRACE_ENABLED) {
         super.printStackTrace(writer);
      }
      NestedThrowable.Util.print(nested, writer);
   }

   /**
    * Prints the composite message and the embedded stack trace to
    * <tt>System.err</tt>.
    */
   public void printStackTrace() {
      printStackTrace(System.err);
   }
}
